Paloma Manual

8/13/2019 Paloma Manual

1/40

Indoor Water Heater

Outdoor Water Heater

FOR YOUR SAFETY!

Do not store or use gasoline or otherflammable vapors or liquids or other

combustible materials in the vicinity of this

or any other appliance. To do so may resultin an explosion or fire.

WHAT TO DO IF YOU SMELL GAS

l Do not try to light any appliance.

l Do not touch any electrical switch; do not

use any phone in your building.

l Immediately call your gas supplier

from a neighbors phone. Follow the

gas suppliers instructions.

l If you cannot reach your gas supplier, call

the fire department.

l Do not return to your home until authorized

by the gas supplier or fire department.

Improper installation, adjustment,alteration, service or maintenance can cause

property damage, personal injury or death.

Refer to this manual. Installation and service

must be performed by a qualified installer,

service agency or the gas supplier.

WARNING: If the information in these instructions is not followed exactly,a fire or explosion may result, causing property damage, personal injury or death.

The purpose of this manual is twofold: one, to provide the installer with

the basic directions and recommendations for the proper installation and

adjustment of the water heater; and two, to the owneroperator, to

explain the features, operation, safety precautions, maintenance and

troubleshooting of the water heater. This manual also includes a parts

list.

It is very important that all persons who are expected to install, operate

or adjust this water heater read the instructions carefully so they may

understand how to perform these operations. If you dont understand

these instructions or any terms within it, seek professional assistance.

Any questions regarding the operation, maintenance, service or

warranty of this water heater should be directed to the seller from whom

it was purchased, local distributor or Paloma.

Do not destroy this manual. Please read carefully and keep in a safe

place for future reference.

Recognize this symbol as an indication of Important Safety

Information!

California Proposition 65 Warning: This product contains

chemicals known to the State of California to cause cancer, birth

defects or other reproductive harm.

Installation and Operating Instruction ManualWith Installation Instructions for the Installer

Tankless Water Heater

DESIGN

Warning: This water heater is not suitablefor use in manufactured (mobile) homes!

Indoor and Outdoor GasR

Models:PH-28R IFSN (Natural Gas); PH-28R IFSP (L.P. Gas): Residential Indoor

PH-28R OFN (Natural Gas); PH-28R OFP (L.P. Gas): Residential Outdoor


2/40

Safety Information

Safety Precautions. . . . . . . 36

LP Gas Models . . . . . . . . . . . 5

Installation Instructions

Location, Outdoor. . . . . . . . . . 7

Location, Indoor . . . . . . . . . 8, 9

Venting . . . . . . . . . . . . . . 10-15

Water Connections. . . . . 16-18

Gas Supply. . . . . . . . . . . . . . 19

High Altitude. . . . . . . . . . . . . 19

Remote Control . . . . . . . 20, 21

Electrical Connection . . . . . . 22

Typical Installation. . . . . . . . 23

Pipe Insulation . . . . . . . . . . . 24

Installation Checklist . . . . . . 25

Operating Instructions

Lighting Instructions . . . . . . 26

Water Temperature. . . . . 27, 28

Care and CleaningMaintenance. . . . . . . . . . . . . 29

Housekeeping . . . . . . . . 29, 30

Vent Inspection . . . . . . . . . . . 30

Burner Inspection . . . . . . . . 30

Extended Shut-Down. . . . . . 30

Draining . . . . . . . . . . . . . . . . 31

Freeze Protection . . . . . . . . . 31

Troubleshooting TipsBefore You Call

For Service . . . . . . . . . . 32, 33

Customer Service

Parts List . . . . . . . . . . . . . . . 34

If You Need Service . . . . . . . 36

Inside you will find many helpful hints on how to use and

maintain your water heater properly. A little preventive care onyour part can save you time and money over the life of your

water heater.

Youll find many answers to common problems in the

Troubleshooting Guide. If you review the chart of

Troubleshooting Tips first, you may not need to call for service.

READ THIS MANUAL

FOR YOUR RECORDS

Write the model and serial numbers here:

#

#You can find them on a label on the appliance.

Staple sales slip or cancelled check here.

Proof of the original purchase date is needed to obtain service

under the warranty.

Your safety and the safety of others are very important. There

are many important safety messages in this manual and onyour appliance. Always read and obey all safety messages.

This is the safety alert symbol. Recognize this symbol

as an indication of Important Safety Information!

This symbol alerts you to potential hazards that can

kill or hurt you and others.

All safety messages will follow the safety alert symbol and

either the word DANGER, WARNING, CAUTION

or NOTICE.

These words mean:

DANGER An imminently hazardous situationthat will result in death or seriousinjury.

WARNING A potentially hazardous situation thatcould result in death or serious injuryand/or damage to property.

CAUTION A potentially hazardous situation thatmay result in minor or moderateinjury.

Notice: Attention is called to observe aspecified procedure or maintaina specific condition.

READ THE SAFETY INFORMATION

Qualified Installers Only!

Dip Switch Adjustment. . . . 35Warranty ..........................37, 38


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Be sure to read and understand the entire Instruction Manual before attempting to install or operate this

water heater. It may save you time and money. Pay particular attention to the Safety Instructions. Failure to

follow these warnings could result in serious bodily injury or death. Should you have problems understanding

the instructions in this manual, or have any questions, STOP, and get help from a qualified service technician,

or the local gas utility.

IMPORTANT SAFETY INFORMATION.READ ALL INSTRUCTIONS BEFORE USING.

Failure to install and properly vent the water heater to the outdoors as outlined in the

Venting Section of the Installation Instructions in this manual can result in unsafe operation

of the water heater. To avoid the risk of fire, explosion or asphyxiation from carbon

monoxide, never operate this water heater unless it is properly vented and has an adequate

air supply for proper operation.

Be sure to inspect the vent outlet on the OUTDOOR water heater, or the vent terminal and

the vent system on the INDOOR water heater for proper installation at initial start-up; and

at least annually thereafter. Refer to the Care and Cleaning section of this manual for moreinformation regarding vent system inspection.

DANGER!INSTALL AND PROPERLY VENT THE WATER HEATER

Gasoline, as well as other flammable materials and liquids (adhesives, solvents, paint

thinners etc.), and the vapors they produce are extremely dangerous. DO NOT handle, useor store gasoline or other flammable or combustible materials anywhere near or in the

vicinity of a water heater or any other appliance. Be sure to read and follow the labels on

the water heater, as well as the warnings printed in this manual. Failure to do so can result

in property damage, bodily injury or death.

WARNING!

D A N G E R

FLAMMABLES Flammable Vapors

Water heater has a mainburner flame.The main burner flame:1. which can come on at any time and2. will ignite flammable vapors.

Vapors:1. cannot be seen,2. are heavier than air,3. go a long way on the floor and4. can be carried from

other rooms to themain burner flame byair currents.

Vapors from flammableliquids will explode andcatch fire causing death orsevere burns.

Do not use or store flammableproducts such as gasoline,solvents or adhesives in thesame room or area near thewater heater.

Keep flammable products:1. far away from heater,2. in approved containers,3. tightly closed and4. out of children's reach.

Installation:Do not install water heaterwhere flammable products willbe stored or used unless themain burner flame is at least

18" above the floor. This willreduce, but not eliminate, therisk of vapors being ignitedby the main burner flame.

Read and follow water heater warnings and instructions. Ifowners manual is missing, contact the retailer or manufacturer.


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Time/Temperature Relationship in Scalds

Water Temperature Time To Produce a Serious Burn

120F (49C) More than 5 minutes

125F (52C) 11/2 to 2 minutes

130F (54C) About 30 seconds

135F (57C) About 10 seconds

140F (60C) Less than 5 seconds

145F (63C) Less than 3 seconds

150F (66C) About 11/2 seconds

155F (68C) About 1 second

Table courtesy of Shriners Burn Institute

The chart shown above may be used as a guide indetermining the proper water temperature for your home.

DANGER: Households with small children, disabled orelderly persons may require a 120F (49C) or lowertemperature setting to prevent contact with HOT water.

Maximum water temperature occurs while burner is on.To find water temperature being delivered, turn on a hotwater faucet and place a thermometer in the water stream

and read the thermometer. (See page 27 & 28 for moredetails.)

The temperature of the water at the outlet of the waterheater can be regulated by setting the temperature onRemote Control. The remote control was set at 100F(38C) before it was shipped from the factory.

The diagram to the bottom left illustrates the RemoteControl and how to adjust the water temperature.

Notice: The factory setting allows operating temperaturesbetween 100F (38C) and 120F (49C). Temperaturesof up to 140F (60C) for Residential models and up to

180F (82C) for Commercial models can be achievedwith the MAIN (UMC-117) remote control and a dipswitch adjustment. Only qualified service personnelshould perform this adjustment. Only factory authorizedremote control(s) should be used.

Notice: When this water heater is supplying generalpurpose hot water requirements for use by individuals,a thermostatically controlled mixing valve for reducing

point of use water temperature is recommended to reducethe risk of scald injury. Contact a licensed plumber or thelocal plumbing authority for further information.

D A N G E R!

HOT

Water temperature over 125F cancause severe burns instantly ordeath from scalds.

Children, disabled and elderly areat highest risk of being scalded.

See instruction manual beforesetting temperature at waterheater.

Feel water before bathing orshowering.

Temperature limiting valves areavailable, see manual.

BURN

DANGER!WATER TEMPERATURE SETTING

Safety and energy conservation are factors to be considered when selecting the watertemperature setting of a water heaters remote control. Water temperatures above

125F (52C) can cause severe burns or death from scalding. Be sure to read and follow

the warnings outlined on the label pictured below.

IMPORTANT SAFETY INFORMATIONREAD ALL INSTRUCTIONS BEFORE USING.

F

PRIORITY

POWERON/OFF

100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 150 160 170 180 F

Higher (Hotter) Lower (Cooler)

38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 66 71 77 82 C

Notice: Only commercial model water heaters can

achieve temperatures up to 180F (82C).* Temperatures above 120F (49C) can be achieved

by adjusting the dip switch See page 35 for dip

Notice:

Display

showsF only.


5/40

Both LP and natural gas have an odorant added to aid in detecting a gas leak. Somepeople may not physically be able to smell or recognize this odorant. If you are unsure orunfamiliar with the smell of LP or natural gas, ask the gas supplier. Other conditions, such asodorant fade, which causes the odorant to diminish in intensity, can also hide or camouflagea gas leak.

DANGER!NATURAL GAS AND LIQUEFIED PETROLEUM MODELS

lWater heaters utilizing LP gas are different

from natural gas models. A natural gas

water heater will not function safely on LP

gas and vice versa.

l No attempt should ever be made to convert

the water heater from natural gas to LP

gas. To avoid possible equipment damage,personal injury or fire, do not connect the

water heater to a fuel type not in

accordance with the unit data plate;

propane for propane units and natural gas

for natural gas units. These units are notcertified for any other fuel type.

l LP appliances should not be installed below

grade (for example, in a basement) if suchinstallation is prohibited by federal, state

and/or local laws, rules, regulations or

customs.

l Propane or LP gas must be used with greatcaution. It is heavier than air and will

collect first in lower areas, making it hard

to detect at nose level.

l Before attempting to light the water heater,

make sure to look and smell for gas leaks.

Use a soapy solution to check all gas fittings

and connections. Bubbling at a connection

indicates a leak that must be corrected.When smelling to detect a gas leak, be sure

to sniff near the floor also.

l Gas detectors are recommended in LPand natural gas applications and their

installation should be in accordance with

the detector manufacturers

recommendations and/or local laws,

rules, regulations or customs.

l It is recommended that more than one

method, such as soapy solution, gas

detectors, etc., be used to detect leaks

in gas applications.

Notice: If a gas leak is present or suspected:

lDo notattempt to find the cause yourself.

lDo nottry to light any appliance.

lDo nottouch any electrical switch.

lDo notuse any phone in your building.

l Leave the building immediately and makesure your family and pets leave also.

l Leave the doors open for ventilation and

contact the gas supplier, a qualified serviceagency or the fire department.

l Stay away from the building until the

service call has been made, the leak iscorrected and a qualified agency has

determined the area to be safe.


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Have the installer show you the location of the gas shut-off valve and how to shut it offif necessary. Turn off the manual shut-off valve if the water heater has been subjectedto overheating, fire, flood, physical damage or if the gas supply fails to shut off.

l Read this manual entirely before installing

or operating the water heater.

lUse this appliance only for its intendedpurpose as described in this Instruction

Manual.

l Be sure your appliance is properly installed

in accordance with local codes and the

provided installation instructions.

l Do not attempt to repair or replace any

part of your water heater unless it is

specifically recommended in this manual.

All other servicing should be referred to aqualified technician.

SAFETY PRECAUTIONS

IMPORTANT SAFETY INFORMATIONREAD ALL INSTRUCTIONS BEFORE USING.

WARNING!For your safety, the information in this manual must be followed to minimize the risk

of fire or explosion, electric shock, or to prevent property damage, personal injury or

loss of life.

FOR INSTALLATIONS IN THE STATE OF CALIFORNIA

California Law requires that water heaters must be braced, anchored or strapped to resist

falling or horizontal displacement due to earthquake motions. For water heaters up to 52

gallon capacity, a brochure with generic earthquake bracing instructions can be obtained from:

Office of the State Architect, 1102 Q Street, Suite 5100, Sacramento, CA 95814 or you may call

916-445-8100 or ask a water heater dealer.

However, applicable local codes shall govern installation. For residential water heaters

of a capacity greater than 52 gallons or tankless-style, consult the local building jurisdiction

code for acceptable bracing procedures.

READ AND FOLLOW THIS SAFETY INFORMATION CAREFULLY.

SAVE THESE INSTRUCTIONS


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Installing the (OUTDOOR) water heater:

This water heater must be installed in accordance with these instructions, local codes, utility companyrequirements and/or in the absence of local codes, use the latest edition of the American NationalStandard/National Fuel Gas Code. A copy can be purchased from either the American Gas Association, 400North Capitol Street Northwest, Washington, DC 20001 as ANSI standard Z223.1 or National Fire ProtectionAssociation, 1 Batterymarch Park, Quincy, MA 02269 as NFPA 54. In Canada, the latest edition of the CSAB149.1 Natural Gas and Propane Installation, and the Canadian Electrical Code, CSA C22.1 Part 1, in theabsence of local codes.

Location of the OUTDOOR water heater

The water heater shown on the left is forOUTDOOR installation ONLY!

This water heater is an outdoor modeland must be mounted vertically. Itmust not be installed indoors or in aconfined space.

The water heater should be installedclose to the most frequently used outletand its position chosen with safety andservice in mind.

Make sure people (particular children,disabled, and elderly) will not touch thehot water outlet or the flue terminal.The flue terminal and air inlet must beclear of obstruction and shrubbery.

The water heater should not be locatedin an area where leakage of the heatexchanger or connections will resultin damage to the area adjacent to itor to lower floors of the structure.

A gas fired water heater or any otherappliance should not be installed ina space where liquids which give offflammable vapors are to be used or stored.Such liquids include gasoline, LP gas(butane or propane), paint or adhesivesand their thinners, solvents or removers.

Because of natural air movement in aroom or other enclosed space, flammablevapors can be carried some distance fromwhere their liquids are being used orstored. The open flame of the waterheaters main burner can ignite these

vapors, causing an explosion or fire whichmay result in severe burns, death or

property damage.

The water heater must be located so it is notsubject to physical damage, for example, bymoving vehicles, area flooding, etc.

l The water heater should be installedvertically with the water, gas and powerconnections on the underside pointingtoward the ground.

l Failure to properly install the water heateroutdoors as outlined in this manual canresult in unsafe operation.

l Hot and cold water lines should be insulatedto conserve water and energy.

l The water heater and water lines shouldbe protected from exposure to freezingtemperatures.

l Do not install water heater where subjectto vibrations.

l Do not install the water heater inRecreational Vehicles, Mobile Homes,

Boats and other Watercrafts.l Do not install the water heater near

vents for heating or cooling. A minimumof 4 feet should be maintained.

lMinimum clearance from combustibleand noncombustible construction is1/2 (1.3 cm) sides, 0 rear (with support

bracket); 12 (30 cm) from the bottom;12 (30 cm) from the front of the waterheater; (24 [61 cm] from frontrecommended for servicing purposes).If the clearances stated on the Instruction/Warning Label, located on the front panel

of the heater differ, install the waterheater according to the clearances statedon the label.

WARNING: Combustibleconstruction refers toadjacent walls and ceilingsand should not be confusedwith combustible orflammable products andmaterials. Combustibleand/or flammable productsand materials should neverbe stored in the vicinity ofthis or any gas appliance.

min.

1/2 "

(1.3 cm)

min.

1/2 "

(1.3 cm)

min. 12" (30 cm)

(24" (61 cm) minimum is

recommended for service)

Front = 12" (30 cm)Back = 0" (with support bracket)

Side = 1/2" (1.3 cm)Bottom = 12" (30 cm)

Minimum Clearance from Combustible and

Non-Combustible Construction.

Top: Do not install this water

heater under an overhang less

than 36 (91 cm) from its top.

The area under the overhang

must be open on 3 sides.

CAUTION:Protect plastic, paint orother items sensitive to heatusing non-combustibleinsulation if these areexposed to the flue exhausteven though they may be

more than 24 (61 cm) awayfrom the water heater.


8/40

WARNING: Follow vent

manufacturers instruction

while installing vent. If

required, provide additionalclearances from vent to

combustibles per vent

manufacturers instruction.

Installing the (INDOOR) water heater :

This water heater must be installed in accordance with these instructions, local codes, utility companyrequirements and/or in the absence of local codes, use the latest edition of the American NationalStandard/National Fuel Gas Code. A copy can be purchased from either the American Gas Association, 400North Capitol Street Northwest, Washington, DC 20001 as ANSI standard Z223.1 or National Fire ProtectionAssociation, 1 Batterymarch Park, Quincy, MA 02269 as NFPA 54. In Canada, the latest edition of the CSAB149.1 Natural Gas and Propane Installation, and the Canadian Electrical Code, CSA C22.1 Part 1, in theabsence of local codes.

Location of INDOOR Water Heater

The water heater shown on the left is forINDOOR installation ONLY!

The water heater should not be located in

an area where leakage of the heat exchanger

or connections will result in damage to the

area adjacent to it or to lower floors of the

structure.

When such areas cannot be avoided, it is

recommended that a suitable catch pan,

adequately drained, must be installed under

the water heater.

The pan must not restrict combustion

air flow.

A gas fired water heater or any other appliance

should not be installed in a space where

liquids which give off flammable vapors are

to be used or stored. Such liquids include

gasoline, LP gas (butane or propane), paint

or adhesives and their thinners, solvents

or removers.

Because of natural air movement in a room or

other enclosed space, flammable vapors can be

carried some distance from where their liquids

are being used or stored. The open flame of

the water heaters main burner can ignite these

vapors causing an explosion or fire which may

result in severe burns, death or property

damage.

The water heater must be located so it is not

subject to physical damage, for example, by

moving vehicles, area flooding, etc.

If the water heater is installed in a garage, itshould be installed so that the direct ignition

system and main burner are no less than 18

inches (45 cm) above the garage floor.

Raising the gas fired water heater will reduce

BUT NOT eliminate the possibility of lighting

the vapor of any flammable liquids which may

be improperly stored or accidentally spilled.

l The water heater should be installed as

close as practical to the vent termination to

minimize vent length and the number of

elbows required for venting.

l The water heater shouldbe installed withthe proper venting materials and terminationsuitable for Category III venting.

l A fire stop plate should be installed at everypenetration of a floor or ceiling if the vent isnot running in a fire rated shaft.

l Failure to install and properly vent thewater heater to the outdoors as outlinedin the Venting Section of this manualcan result in unsafe operation.

l Long hot water lines should be insulated toconserve water and energy.

l The water heater and water lines shouldbe protected from exposure to freezingtemperatures.

l Do not install the water heater inbathrooms, bedrooms, any occupied roomsnormally kept closed, or in outdoor areas.

l Do not install the water heater in small,poorly ventilated rooms, or in airtightrooms with air conditioning.

l Do not install water heater where subjectto vibrations.

l Do not install the water heater inRecreational Vehicles, Mobile Homes,Boats and other Watercrafts.

l Do not install the water heater near ventsfor heating or cooling. A minimum of 4feet (1.2 m) should be maintained.

l Minimum clearance from combustible andnon-combustible construction is 1/2 (1.3cm) sides, 0 rear (with support bracket);12 (30 cm) from the bottom; 12 (30 cm)from the front of the water heater; and 12(30 cm) from the top (24 [61 cm] fromfront and top is recommended for servicing

purposes).

l Maintain a minimum clearance of 3 (8 cm)around the vent pipe to combustible or non-combustible construction, unless otherwisespecified by vent manufacturer or installedin an enclosed space. If the clearances

stated on the Instruction/Warning Label,located on the front panel of the heaterdiffer, install the water heater according

WARNING: Combustible

construction refers toadjacent walls and ceilingsand should not be confusedwith combustible orflammable products andmaterials. Combustibleand/or flammable productsand materials should neverbe stored in the vicinity ofthis or any gas appliance.

min.

1/2 "

min.

1/2 "

min. 12"

(24" (61 cm) minimum is

recommended for service)

Top = 12" (30 cm)

Vent = 3"

Front = 12" (30 cm)

min. 3" min. 3"

Back = 0" *

Side = 1/2"

Bottom = 12" (30 cm)

(8 cm) (1.3 cm)

(1.3 cm)(1.3 cm)(8 cm)(8 cm)

(30 cm)

Minimum Clearance from

Combustible and

Non-Combustible

Construction.

3 (8 cm) min

3 (8 cm)min

3 (8 cm)min

Vent

Pipe


9/40

Proper operation of the water heater requires air for combustion and ventilation. Provisions forcombustion and ventilation air must comply with referenced codes and standards.

Combustion and Ventilation Air (Indoor Water Heater Only)

NOTICE: If the water heater is installed in

an unconfined space within a building of

conventional frame, masonry or metal

construction, infiltration air is normally

adequate for proper combustion and

ventilation. If the water heater is installed in

a confined space, provisions for combustion

and ventilation air must be made.

A confined space is one having a volume

of less than 50 cubic feet (1.4 m3) per

1000 Btuh (0.3 kw) of the aggregate input

of all appliances within that space.

The air must be supplied through two

permanent openings of equal area. Oneis to be located within 12 (30 cm) above

the floor and the other is to be located

within 12 (30 cm) below the ceiling.

The minimum net free area of each opening

must not be less than one square inch (6.5

cm2) per 1000 Btuh (0.3 kw) of the total

input rating of all the appliances in the

enclosure (but not less than 100 square

inches [650 cm2]) if each opening

communicates with other unconfined areas

inside the building. The above

requirements shall be used unless:

national, provincial, or local codes governthe requirement for these air openings.

Buildings of unusually tight construction

shall have the combustion and ventilation

air supplied from outdoors, or a freely

ventilated attic or crawl space.If air is supplied from outdoors, directly or

through vertical ducts, there must be two

openings located as specified above and

each must have a minimum net free area

of not less than one square inch

(6.5 cm2) per 4000 Btuh (1.2 kw)of the

total input rating of all the appliances in

the enclosure.

If horizontal ducts are used to

communicate with the outdoors, each

opening must have a minimum net free

area of not less than one square inch

(6.5 cm2) per 2000 Btuh (0.6 kw) of the

total input rating of all the appliances in

the enclosure. If ducts are used, the

minimum dimensions of rectangular air

ducts shall not be less than 3 (7.6 cm).

NOTICE: If the duct openings which supply

combustion and ventilation air are to be

covered with a protective screen or grill, the

net free area (openings in the material) of

the covering material must be used in

determining the size of the openings.

Protective screening for the openings MUST

NOT be smaller than 1/4 (0.64 cm) mesh to

prevent clogging by lint or other debris.

Additional installation information for TheCommonwealth of Massachusetts is locatedon page 36.

Corrosive Atmospheres

The air in beauty shops, dry cleaning

establishments, photo processing labs,

and storage areas for liquid and powdered

bleaches or swimming pool chemicals

often contains such halogenatedhydrocarbons.

An air supply containing halogenated

hydrocarbons may be safe to breathe,

but when it passes through a gas flame,

corrosive elements are released that

will shorten the life of any gas burning

appliance.

Propellants from common spray cans

or gas leaks from A/C and refrigeration

equipment are highly corrosive afterpassing through a flame.

The water heater warranty is voided when

failure of the heater is due to operation in

a corrosive atmosphere.

NOTICE: The water heatershould not be installed nearan air supply containinghalogenated hydrocarbons.

DANGER: OUTDOORwater heaters must notbe installed indoors orin a confined space.Install outdoor waterheaters outdoors only.

Inspect Shipment

Inspect the water heater for possible damage. Check the markings on the rating plate of

the water heater to be certain the type of gas supplied corresponds to the water heater

requirements. Verify all included parts are present (see below).

Air openingsminimum200 sq. in.(1290 cm2).

Min. 3(7.6 cm)

Wood Screw x 5pcs.

FOR YOUR SAFETY!

Do not store oruse gasoline or otherflammable vapors or liquids orother

combustiblematerialsinthevicinityofthisorany otherappliance. Todo so may result in anexplosion orfire.

WHATTO DO IFYOU SMELLGAS

l D li h li

l If you cannot reach yourgas supplier, call

the fire department.

l Do not return to yourhome until authorizedby the gas supplierorfire department.

Improperinstallation, adjustment,alteration, service ormaintenance can cause

propertydamage personal injury ordeath

!

WARNING: If the information in these instructions is not followed exactly ,a fire orexplosion may result causing property damage, personal injury o rdeath.!

Thepurpose of thismanual istwofold: one,to providet h einstallerwiththebasic directionsand recommendationsfortheproperinstallation and

adjustmentofthe waterheater; andtwo,to theowneroperator, toexplain thefeatures,operation, safety precautions, maintenanceandtroubleshooting of thewaterheater. Thismanual also includes a partslist.

It is imperativethat all personswho areexpected to install, operateoradjust this waterheaterread theinstructions carefully so they mayunderstand howto perform theseoper ations. If you dont understand

these instructionsorany termswithin it, seek professional advice.

Any questions regarding the operation, maintenance, service orwarrantyof thiswaterheatershould bedirected to thesellerfrom whom

it was purchased.If additionalinformationisrequired, ref ert o t h esection on Howto Obtain ServiceAssistance.

Do not destroy this manual. Pleaseread carefully and keep in a safe

placeforfuture reference.

Recognizethis symbol asan indication of Important SafetyInformation!

California Proposition 65 Warning: This product containschemicals known to theStateof California to causecancer, birthdefectsorother reproductive harm.

!

!

Use&CareManualWithInstallationInstructionsfortheI nstaller

Water HeatersResidentialGas

Warning: This waterheateris not suitable for

use in manufactured (mobile) homes!

Tankless

F

PRIORITY

POWERON/OFF


10/40

Installing the (INDOOR) water heater:The water heater must be installed with a 4 diameter UL approved Category III Stainless Steel appliancevent pipe and an appropriate adapter.

VentingThe installation of venting must comply

with national codes, local codes and thevent manufacturers instructions.

The water heater must be vented to theoutdoors as described in these instructions.DO NOT connect this water heater to achimney. It must be vented separately fromall other appliances.

All vent components (adapters, pipe, elbows,terminals, etc.) should be UL 1738 CertifiedStainless Steel Venting Material(e.g. AL29-4C).

The specified vent termination must be used.The termination should be a 90 elbow withscreen. (Refer to pages 14 and 15 for anexample of 90 termination)

Use a vent pipe with an anti-disconnectionjoint.

The use of a High Temperature Silicone(500F [260C]) may be required to sealvent connections. To prevent accidental gasexhaust leakage, apply a 1/4 (6 mm) wide

bead approximately 1/4 (6 mm) from theend and another bead against the joint sideof the stop bead.

Follow vent manufacturers installationinstructions and their recommendedclearances to combustibles.

The unit can be vented either horizontallyor vertically.

Vent pipe runs must be adequately supported

along both horizontal and vertical runs.The maximum recommended unsupportedspan should be no more than five (5) feet(1.5 m). Support isolation hanging bandsshould be used. DO NOT use wire. (Seediagram below).

Notes on pre-existing vent:

If the water heater is being installed as areplacement for an existing water heater, athorough inspection of the existing ventingsystem must be performed prior to anyinstallation work. Verify that the correctmaterials, vent lengths and terminal locationsas detailed in this Instruction Manual have

been met. Carefully inspect the entireventing system for any signs of cracks orfractures, particularly at the joints betweenelbows or other fittings and the straight runsof vent pipe. Check the system for signs ofsagging or other stresses in the joints as aresult of misalignment of any components inthe system. If any of these conditions arefound, they must be corrected in accordancewith the venting instructions in this manual

before completing the installation andputting the water heater into service.

DANGER: Failure toinstall the appliance vent

adapter and properly ventthe water heater to theoutdoors as outlined in theVenting section of thismanual will result in unsafeoperation of the waterheater, causing death,serious injury, explosion,or fire. To avoid the riskof fire, explosion, orasphyxiation from carbonmonoxide, NEVER operatethe water heater unless it isproperly vented and hasadequate air supply forproper operation asoutlined in the Ventingsection of this manual.

WARNING: Use 4UL approved Category IIIStainless Steel vent materialonly. No other ventmaterial is permitted.

WARNING: Refer topage 8 for clearances tocombustible material.

NO! YES!

Venting LengthsMAXIMUM VENT LENGTH: Thesystem will not operate if there is excessiverestriction (pressure drop) in the ventingsystem. A maximum of 47 6 (14.4 m) vent

pipe may be used provided there is only one90 elbow in the system. If additional elbowsare required: two elbows can be used with42 6 (13 m) and three elbows can be usedwith 37 6 (11.4 m).

A 90 elbow is equivalent to 5 (1.5 m) ofstraight pipe. A 45 elbow is equivalent to2 6 (76 cm) of straight pipe.

The termination elbow does not count as anelbow when determining total vent lengths.

The vent can be installed with a slightdownward slope of 1/4 per foot ofhorizontal run toward the vent terminal (see

diagram below). This ensures that anycondensate formed during operation of theunit is evacuated from the appliance.

A 1/4 per foot upward slope is acceptablewhen it is not possible to vent with adownward slope; however, a UL approvedCategory III Stainless Steel condensate trapMUST be installed at the beginning of thehorizontal run. (See page 14 Example B:

Typical Horizontal Termination w/ 1/4 perfoot UPWARD Slope or page 15, StandardVertical Vent Termination for examples).

MINIMUM VENT LENGTH: The ventingmay be as short as 12 (30 cm), providedone vent termination is installed to theoutdoors through a sidewall, one 90 elbowis included in the installation and the wallthimble is installed.

Notice: Make sure that the seam of the ventpipe in horizontal runs is toward the top ofthe installation (see diagram to the far left).

Min. 3"

(8 cm)

Max. 2 feet(61 cm)

1/4" per footdownward slope

Vent Seam

Number of

90 elbows

(bends)

Maximum

Length of

Straight Pipe

1

2

3

47 6

(14.4 m)

42 6

(13 m)

37 6

(11.4 m)


11/40

Venting Through Closed Spaces

If the vent piping passes through a closed space, a minimum clearance of8 (20 cm) when installed horizontally or 6 (15 cm)when installedvertically should be maintained between the vent pipe and combustibles

and noncombustibles. Be sure to follow local codes and ventmanufacturers installation instructions.

For maintenance and inspection purposes, the following access panelsare required.

l Two (2) inspection access panels large enough to allow access for

venting inspection. One (1) of these access panels should be close

to where the vent pipe enters the ceiling. The other access panel

should be near the vent termination.

l A ventilation access panel with a 16 in2 (103 cm2) opening should

be provided every 10 ft (3 m).

downward slope/4 per oot

Ceiling

Vent Pipe

Wall Thimble

Board

Inspection

FireStop

Access Panel #1Inspection

Access

Panel #2

Appliance Vent Adapter

The water heater must be installedwith a UL 1738 approved Category IIIStainless Steel appliance vent adapter.

Read the following instructions before

installation.

l Test fit the adapter over the water heater

collar before proceeding. Adjust clamp as

needed.

l With an alcohol wipe, clean inside surface

A of adapter and outside surface B of

heater collar.

l Apply 1/4 (6 mm) wide bead of high

temperature silicone (500F [260C])

around outside of heater collar B.

l Slide adapter end A down over heater

collar B as far as it will go.

l Tighten the clamp around the collar.

l Inspect the inside of the adapter to verify

that the collar and adapter are sealed. If

more sealant is required, apply sealant to a

flat tool, then spread around the collar edge

on inside of adapter.

l Ensure that the clamp does not interfere

with the damper shaft.

NOTICE: Follow the appliance vent adapter

manufacturers instructions.

A

B

High Temp.

Sealant

Collar

Appliance

Vent Adapter

Clamp

Water Heater

Exhaust

Flow

Draining the CondensateProvision should be made to collect anddispose of condensate from venting systems.

When a water heater is vented horizontally,the vent pipe can have a DOWNWARD orUPWARD slope towards the termination. Ifan UPWARD slope is used, a condensate trapmust be installed as close as practical to thewater heater in order to prevent condensatefrom draining back into the water heater. SeeExamples A and B on page 14 forDOWNWARD and UPWARD slope forhorizontally vented water heaters.

When a water heater is vented vertically, anUPWARD slope must always be used. Acondensate trap must be installed in thehorizontal section of the vent and as closeas practical to the water heater in order to

prevent condensate from draining back intothe water heater. See the diagram on page 15showing UPWARD slope for verticallyvented water heaters.

Always attach a drain hose to the drain fittingand plumb the hose to a sanitary sewer drain.

A high temperature silicone tubing suitable foruse with acidic condensate and appropriate forthe temperature range should be used.

The drain tube is fashioned into a pigtail trapand must be filled with water to prevent fluegases from emitting into the building prior to

operating the appliance.

CAUTION: Condensatemust drain away from thewater heater and shouldnot be allowed to drainback into any part of thevent system.

WARNING: Failure toprovide a vent condensatedrain close to the appliancecould allow acidic flue gascondensate to enter intoappliance flueways, causingpremature failure of the

appliance.

CAUTION: Condensateis known to be acidic; referto local, state (provincial)or federal codes for properhandling and dischargemethods.

CAUTION: Ensure that the

appliance vent adapter is

securely attached to the

water heater collar.


12/40

D

V

V

E

FIXED

CLOSED

OPERAB

LE

OPERA

BLEFIX

ED

CLOSED

v

v

B

L

F

C

B

v

v

v

X

B

B

BA

J

B

I

H

Xv

M

K

v

G

A

The following information should be used for determining the proper location of the vent terminal

for indoor and outdoor tankless water heaters.

V VENT TERMINAL X AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED

Installing the water heater:

Horizontal Vent Terminal Location

* If clearances are not specified, then follow local installation codes and the requirement of the gas supplier.

** For condensing appliances: The vent for this appliance shall not terminate over public walkways, near soffit vents, crawl space vents, or other

H = Clearance to each side of center

line extended meter/regulator

assembly. above

3 feet (91 cm) within a height 15 feet

(4.57 m) above the meter/regulator

assembly.

* *

I = Clearance to service regulator vent

outlet.3 feet (91 cm) * *

J = Clearance to nonmechanical air

supply inlet to the combustion air

inlet to any building or other

appliance.

6 inches (15 cm) for appliances 10,000 Btuh (3kW)

and < 100,000 Btuh (30kW), 36 inches

(91 cm) for appliances > 100,000 Btuh

(30kW).

4 feet (1.2 m) below or to side of

opening; 1 foot (300 mm) above

opening.

6 inches (15 cm) for appliances < 10,000

Btuh (3 kW), 9 inches (23 cm) for

appliances > 10,000 Btuh (3kW) and 50,000 Btuh (15kW).

K = Clearance to mechanical air

supply inlet.6 feet (1.83 m)

3 feet (91 cm) above if within 10 feet

(3 m) horizontally.

3 feet (91 cm) above if within 10 feet

(3 m) horizontally.

L = Clearance above paved sidewalk

or paved driveway located on

public property.

Not Allowed Not Allowed Not Allowed

M = Clearance under veranda, porch,

deck or balcony. Not Allowed Not Allowed Not Allowed

Canadian Installations 1

Indoor and OutdoorUS Installations 2

Indoor

US Installations 2

Outdoor

A= Clearance above grade, veranda,

porch, deck or balcony.12 inches (30 cm) above anticipated

snow level.

12 inches (30 cm) above anticipated

snow level.

12 inches (30 cm) above anticipated

snow level.

B= Clearance to window or door that

may be opened. 6 inches (15 cm) for appliances < 10,000

Btuh (3 kW), 12 inches (30 cm) for

appliances > 10,000 Btuh (3kW) and 100,000 Btuh (30kW).

4 feet (1.2 m) below or to side of

opening; 1 foot (300 mm) above

opening.

6 inches (15 cm) for appliances 10,000 Btuh (3kW)

and < 50,000 Btuh (15kW), 12 inches

(30 cm) for appliances > 50,000 Btuh

(15kW).

C= Clearance to permanently closedwindow.

* * *

D= Vertical Clearance to ventilated

soffit located above the terminal

within a horizontal distance of 2

feet (61 cm) from the center line

of the terminal.

* * *

E= Clearance to unventilated soffit. * * *

F= Clearance to outside corner.* * *

G= Clearance to corner. * * *


13/40

Additional Considerations

Do NOT install vent terminal under any patio or deck.

To help prevent moisture from freezing on walls and under

eaves, do not locate vent terminal on the side of a building withprevailing winter winds.

To help prevent water lines from freezing, do not locate ventterminal on the side of a building with prevailing winter winds.

Do Not terminate vent directly on brick or masonry surfaces. A rustresistant sheet metal backing plate ( 1 x 1 foot)(30 x 30 cm) isrecommended behind vent. (See Figure.)

Do NOT locate vent terminal too close to shrubbery, as flue gasesmay damage them.

Caulk all cracks, seams and joints within six (6) feet (1.8 m) of ventterminal.

Caulk around thimble face plate for weather tight seal.

All painted surfaces should be primed to lessen the chance ofphysical damage. Painted surfaces will require maintenance.

Insulate vent pipe of water heaters exposed to cold conditions(attics, crawl spaces, etc.) with inflammable material to help preventmoisture from accumulating in vent pipe. The insulation should berated for the temperature and should not contain substances thatcorrode the vent pipe.

Do NOT extend exposed vent pipe of indoor water heaters outsideof building.

Guard vent against accidental contact with people and pets.

Install outdoor water heater such that air inlet and flue outlet isabove anticipated snow level.

(1.8 m)

If soffit vent is too close,block off and install newvent at another location

Insidecorner

Caulk

Caulk

Caulk

6' (1.8 m)caulk zone orto edge ofwindow etc., startingwithin 6' (1.8 m)

Rising moisture will collect under eaves

4'

6' (1.8 m) caulkzone

6'

(1.2 m) 12 (30 cm)

WARNING: Moisture in the flue gas will condense as

it leaves the vent terminal. In cold weather this condensate

can freeze on the exterior wall, under the eaves and on

surrounding objects. Some discoloration on the exterior of

the building is to be expected. However, improper location

or installation can result in severe damage to the structure

or exterior finish of the building.

Outdoor Water Heater

Indoor Water Heater

Inside

Corner Caulk

6(1.8 m)Caulk Zone

If soffit vent is too close,

block off and install new

vent at another location.

Caulk

Caulk

Rising moisture will

collect under eaves.

6

4 Wall thimble face plate

(1.8 m)

6(1.8 m)Caulkzone or to edge of windowetc.,starting within 6(1.8 m).

RTV silicone caulk

(1.2 m)12(30 cm)


14/40Example A: Typical Horizontal Termination

/ 1/4 f DOWNWARD Sl

Installing the (INDOOR) water heater:

Vent Horizontal Wall Thimble Installation

An approved 4 inch (10 cm) Vent HorizontalWall Thimble must be used.

The Wall Thimble requires mechanicalsupport from the wall sufficient to support anyincidental loads on the system. If the wall isnot sufficient enough to support the WallThimble, then appropriate additional framingand/or blocking is required.

INSTALLATION PROCEDURE: Preparean opening for the Wall Thimble in the wall.The opening must be 6-1/2 (16 cm) indiameter for a 4 (10 cm) vent system.

If there are not sufficient support membersto secure the Wall Thimble or if there is a

semirigid foam insulation layer under thesheathing, appropriate fasteners must be usedto secure the Wall Thimble to the supportmembers.

The Wall Thimble is designed to adapt toany wall thickness from 3-1/2 (9 cm) to6 (15 cm) thick. If the wall is thicker than6 (15 cm), the Wall Thimble may beextended using a piece of 6 (15 cm) diametersnaplock or welded seam galvanized pipe upto 6 (15 cm) long.

Select the larger diameter half of the Wall

Thimble for the outside of the wall.l Apply a continuous bead of high quality

silicone or silicone/latex caulk on the insideof the outer flange. This will be the onlyweather seal to keep moisture outside the

building. Ensure a sufficient seal is made.

l Position this portion of the Wall Thimbleinto the prepared hole from the outside.Secure the assembly into the preparedopening using fasteners as indicated bysheathing or structural members, sealing thescrew heads with more caulking.

Use four (4) hollow wall anchors, at least1/8 (.32 cm) in diameter and of appropriatelength for the thickness of the sheathing, if

sheathing is particle board or othercomposite material. Use four (4) #10x1-1/4wood screws for plywood, solid woodsheathing or members. Use suitablemasonry anchors when passing throughsolid masonry walls. Reinstall thedecorative sheathing around the WallThimble. This assembly may be painted tomatch the exterior decor.

l Attach a Paloma approved 4 (10 cm)screened, 90 elbow termination to thefemale end of a vent section or slipconnector. Use the method described in theVenting installation instructions providedwith the vent. Slide the vent in through the

outside of the Thimble and seal the annularspace with a thick bead of caulk.

l Slide the interior portion of the Thimbleinto the inside hole. Be certain the interiorand exterior Thimble halves overlap at least1 (2.5 cm). If insufficient overlap exists,extend the interior portion with single wallgalvanized pipe.

l Secure the Wall Thimble to the interiorsheathing using suitable fasteners.

l Secure the vent section or slip connectorthat protrudes through the Wall Thimble

to the rest of the vent system as describedin the Venting installation instructions

provided with the vent.

l Proper support must be provided for thevent pipes as mentioned in the ventingsection.

l Support method used should isolate thevent pipe from floor joist or other structuralmembers to help prevent the transmissionof noise and vibration.

l Do not support, pin or otherwise secure theventing system in a way that restricts the

normal thermal expansion and contractionof the chosen venting material.

Inner ThimbleSection

Outer ThimbleSection

90 Elbow

Outer

Wall

Inner ThimbleSection

WaterHeater

Outside Wall

Side View

Caulk forweather seal

Inner Wall

Outer ThimbleSection

90 termination

with screen

VentPipe

MountingBrackets

Appliance

Vent Adapter

Side View

Side View

WARNING: Use ULapproved Category III ventmaterial only. No othervent material is permitted.

CAUTION: Follow thevent manufacturersinstallation instructions asdesign might vary frommanufacturer tomanufacturer.

VentAdapter

SupportHanger

Condensate Trap

To Drain. Dispose ofcondensate in accordancewith local codes

1/4" per foot upward slope

3" (8 cm)Clearance

2'(61 cm)

Max

VentAdapter

3" (8 cm) Clearance

SupportHanger

1/4" per foot downward slope

2'(61 cm)

Max

Example B: Typical Horizontal Termination

/ 1/4 f UPWARD Sl


15/40

Vertical Vent Installation

A fire stop plate should be installed at everypenetration of a floor or ceiling if the vent isnot running in a fire-rated shaft. Maintain therecommended air space clearance tocombustible materials and building insulation.

Once the vent terminal location has beendetermined, make a hole through the roof andinterior ceiling to accommodate the vent pipe.Complete the vent pipe installation to the

water heaters vent connector fitting on thewater heater vent collar outlet. Supportvertical or horizontal runs as previouslymentioned. If required, use silicone sealantat the point the vent connector joins thewater heater.

Install adequate flashing where the vent pipepasses through the roof. Determine the ventterminal height and install the vent pipeaccordingly. Refer to the diagram above for

proper vent terminal height. Connect ventelbow onto vertical pipe through roof.Connect short piece of vent pipe(approximately 6 long [15 cm]) toelbow, and the terminal elbow with the

protective screen.The vent roof system must terminate at least1 foot (30 cm) above the roof line and at least2 feet (61 cm) higher than any portion of the

building within 10 feet (3 m).

Install supports every 5 feet (1.5 m) verticallyalong the vent pipe route. Vertical supports

are required after everytransition to vertical and arerequired after every offsetelbow. When the vent is free-standing and penetrates aroof/ceiling, another means of

support must be used at asecond location.

Follow the vent manufacturersrecommended installationinstructions provided with thevent purchased from themanufacturer.

Chase Requires

6" (15 cm) Clearance

to Combustibles

Firestop

Firestop

Roof Jack

Adjustable

Roof Flashing

Vent

Adapter

3" (8 cm) Clearance

Support

HangerCondensate

Trap

To Drain. Dispose of

condensate in accordance

with local codes

Storm

Collar

Support

Clamp


2'

(61 cm)

Max

Standard Vertical Vent Termination

Vertical Vent Termination Location

The location of the vent terminal depends on the followingminimum clearances and considerations (see diagram at left):

Minimum twelve (12) inches (30 cm) above roof.2

Minimum twelve (12) inches (30 cm) above anticipatedsnow level.

Maximum twenty-four (24) inches (60 cm) above roof levelwithout additional support for vent.

Four (4) feet (1.2 m) from any gable, dormer or otherroof structure with building interior access (i.e., vent,window, etc.).

Ten (10) feet (3 m) from any forced air inlet to the building.Any fresh or make-up air inlet such as a dryer or furnacearea is considered to be a forced air inlet.3

Min. 12" (30 cm)Above Roof1

Min. 12" (30 cm)Above AnticipatedSnow Level

Max. 24" (60 cm)Above Roof (WithoutAdditional Support)

Vent PipeThrough Roof

Elbow

Termination Elboww/ Protective Screen

Small (6 min) (15 cm)section of vent

Notice: Only Palomaapproved terminationand parts should be usedduring installation.

Notice: Follow vent

manufacturers installationinstructions and theirrecommended clearances tocombustibles as required.

Chase Requires

6" (15 cm) Clearance

to Combustibles

Firestop

Firestop

Roof Jack

Rain Cap

AdjustableRoofFlashing

Vent

Adapter

3" (8 cm) Clearance

Support

HangerCondensate

Trap

To Drain. Dispose of

condensate in accordance

to local codes

Storm

Collar

Support

Clamp


2'

(61 cm)

Max

Alternate Vertical Vent Termination

with Rain Cap

Vent PipeVent Pipe

2 For installations in Canada 18 (45.7 cm).3 For installations in Canada 6 (1.8 m).

1 Min. 18 (46 cm) above roof for installations. in

Canada.


16/40

Water Supply ConnectionsIMPORTANT: Do notapply heat to the HOT orCOLD water connections. Ifsweat connections are used,sweat tubing to adapterbefore fitting adapter to thewater connections onheater. Any heat applied tothe water supply fittingswill permanently damagethe internal componentsof the water heater.

Mounting the Water Heater

Make sure the location of the appliance allows

for easy access and operation.

Wall studs should be utilized when mounting

the water heater to the wall. Alternately, a

suitable piece of wood may be placed inside

or outside of the wall to span the distance

between the wall studs. Fasten the water

heater mounting brackets to the wood.

In case of dry wall or concrete wall, use

drywall anchors or lag bolts.

The water heater requires 120VAC/60Hz.

Have a receptacle with ground terminal near

the water heater. The length of the power

supply cord is 10 feet (3 m) (indoor water

heater only.)

Install a wood screw for the upper bracket

with a clearance of 1/8 (.32 cm) between the

wall and the screw head. Hang the center of

the upper bracket on the screw.

Using a wood screw and a washer, affix the

lower bracket to the wall (Left and Right).

Repeat to affix the top bracket.

The brackets can be adjusted to change the

distance between the back of the appliance

and the wall within the range of 3/8 (.95 cm)

to 1-1/2 (3.8 cm).

Loosen the adjustment screws of both the top

and the bottom brackets to adjust the distance

(See diagram below).

Bracket

BracketAdjustment Screws

Adjustment ScrewsTOP

BOTTOM

Upper Bracket

Washer

Washer

Wood

Screw

Wood

Screw

Wood

Screw Lower Bracket

1/8" (.32 cm)Clearance

Plumbing should be carried out by a qualifiedplumber in accordance with local codes.

Use approved plumbing materials only.

The diameter of the pipe lines should be a

minimum of 3/4(2 cm).

To conserve energy and to prevent freezing,insulate both cold and hot water supplylines. DO NOT cover the drain or pressurerelief valve.

To ensure proper operation of the waterheater, the following water pressure guidelinesshould be followed:

l Operation of the water heater requires theminimum water pressure of 14 psi (97 kPa)and a minimum water flow rate of 0.66gpm (2.5 lpm).

l A water pressure of 40 psi (276 kPa) isrequired to achieve maximum flow rate.

Required Water Pressure = Min. OperatingWater Pressure (14 psi [97 kPa]) + PipePressure Loss + Faucet and ShowerPressure Loss + Safety Margin (more than5 psi [34 kPa]).

l To supply hot water to upper floors,additional water pressure (0.44 psi/ft[10 kPa/m]) must be ensured. Themeasurement should be calculated by thedistance between the water inlet of thewater heater (ground level) to the hotwater faucet (upper floor level).

l Well water systems should be set to ensurea minimum system pressure of 40 psi (276kPa). The pressure should remain stableduring the operation of the water heater.

l When the water is supplied from a water

supply tank, the height of the tank and thediameter of the pipes and their relation towater pressure should be taken into

CAUTION:Reinforcement of the wall is

required in case the wall isnot strong enough to holdthe appliance.


Thermal Expansion

A thermal expansion tank will be required if

the water heater is installed in a closed loop

system to prevent damage to heater, related

piping and relief valve. Replacing the relief

valve will not correct the problem! The

expansion tank is designed with an air cushion

built in that compresses as the system pressure

increases, thereby relieving the over pressure

condition and eliminating the repeated

operation of the relief valve. Other methods of

controlling thermal expansion are also

available. Contact your installing contractor,

water supplier or plumbing inspector for

additional information regarding this subject.


17/40

Water Supply Connections, continued

Notice: If the water flow resistance of ashower head is too high, the burner in thewater heater will fail to ignite. Keep the

shower head clean from debris that couldcause additional pressure drop.

Notice: If using mixing valves on theoutlet, choose one that prevents coldwater pressure from overcoming hot waterline pressure.

Notice: If multiple water heaters areinstalled in a manifold system, the

water piping must be in Parallel. Awater pressure of 40 psi (276 kPa) is

recommended for each water heater forproper operation of the water heaters.

Alternate Water Piping Arrangementwith Optional Valve Kit

Valve kits may be purchased and installed asoptional items. Contact your distributor or

place of purchase for details.They allow forone person full diagnostic testing and easeof flushing the system. The kit includes twofull port isolation valves, one for the coldside and one for the hot side. Refer to

page 23.

Install a shutoff valve near the inlet of thewater heater for service and draining

purposes.It is not recommended to use pipes with

smaller diameters than the water supply

connection of the water heater.

Before connecting the water supply pipe

to the water heater, open the shutoff valve

and clean out sand, debris, air, caulking

material, etc. inside the pipe. Connect to

the water inlet, then check water flow.

Close the shutoff valve and clean the

water filter.

Be sure to connect the water inlet and the

hot water outlet as shown on the water

heater. If reversed, the water heater will

not function.

Installation of unions or flexible copper

connections are recommended on the

HOT and COLD water lines, so that the

water heater may disconnect easily for

servicing, if necessary.

Install a Check Valve between the water

heater and the water shutoff valve (see the

top left diagram).

The following should be addressed in

regards to the HOT WATER OUTLET:

l Connections between the water heaterand point(s) of use should be as short

and direct as possible.

l Local codes shall govern the exact type

of pipe material that is to be used for

water connections.

l To conserve energy and minimize heat

loss, insulation of hot water piping is

recommended (see Hot and Cold Pipe

Insulation Installation on page 24).

Notice: The flow rate of hot water may

vary when more than two faucets

(appliances, fixtures, etc.) are being used

simultaneously.

Notice: The pipes MUST be completely

drainable. If the hot water faucets are

located at a point higher than the water

heater, place a drain valve at the lowest

point (see diagram at the left).

Water Filter

Check Valve

Water Inlet

Clean the

Water Filter

Water

Nipple

Air

Relief

Valve

Hot

Water

Tap

Drain Valve

CAUTION: This water heatermust only be used with thefollowing water supply system

conditions:

lWith clean, potable water free

of corrosive chemicals, sand,

dirt or other contaminates.

lWith inlet water temperatures

above 32F (0C), but not

exceeding 120F (49C) for

Residential models and up to

140F (60C) for Commercial

models.

l Free of lime and scale deposits.

l DO NOT reverse the hotand cold water connections.

The water heater will not

operate.

Notice: Use only teflon tape on cold

and hot water connections and

lines.

This appliance is notintended for space heatingapplication. Do notconnect this heater towaterlines previouslyused for space heatingor non-potable waterdistribution. All waterpiping and components

shall be suitable forpotable water.


18/40

Relief Valve

A new pressure relief valve, complying

with the Standard for Relief Valves and

Automatic Gas Shut-Off Devices for Hot

Water Supply Systems, ANSI Z21.22/

CSA 4.4, must be installed at the hot water

outlet connection of the water heater at the

time of installation. Local codes shall

govern the installation of relief valves.

For safe operation of the water heater, be

sure that:

l The pressure rating of the relief valve

must not exceed 150 psi (1034 kPa), the

maximum working pressure of the water

heater as marked on the rating plate.

l The BTUH rating of the relief valve mustequal or exceed the BTUH input of the

water heater as marked on its rating plate.

lNo valve of any type should be installed

between the relief valve and the water

heater

lDischarge from the relief valve should be

piped to a suitable drain to eliminate

potential water damage. Piping used should

be of a type approved for the distribution of

hot water.

lHot and cold water lines should be

insulated up to the water heater. Referto page 24 for details.

l The discharge line must be NO

SMALLER than the outlet of the relief

valve and must pitch downward to allow

complete drainage (by gravity) of the

relief valve and discharge line.

l The end of the discharge line should not

be threaded or concealed and should be

protected from freezing. No valve of any

type, restriction or reducer coupling should

be installed in the discharge line.

Notice: Local codes govern the installation

of relief valves. If local codes require that a

temperature and pressure relief valve should

be installed, the manufacturer recommends a

type 40XL Watts T&Prelief valve or an

equivalent model be used.

Notice: Manual operation of relief valves

should be performed at least once a year. Turn

off the electrical power and gas shutoff valve.

Lift and release lever on the relief valve and

check the manual operation of the relief valve.

You should take precaution to avoid contact

with the hot water coming out of the relief

valve and to prevent water damage.

Notice: If the relief valve on the system

discharges periodically, a problem exists and

service to the water system is required.

The vinyl tubing as shown is supplied only

with indoor water heaters and connects to the

drain valve located at the hot water outlet as

shown in the diagram at left. Route the other

end of the vinyl tubing to the drain pan or a

suitable drain where leakage from the heaterwill not result in damage to the area adjacent

to the heater or to lower floors of the structure.

ReliefValve

PressureReliefValve

Discharge

WaterShutoff

DrainValve

Valve

Hot WaterSupply

Union

Outlet

DrainTube tosuitabledrain

ColdWaterSupplyInlet

Line

Notice: The above illustrates apressure-only relief valve. If localcodes require a combinationtemperature and pressure reliefvalve be installed, an extension

piece may be needed to ensure thatthe valve probe is not directly inthe flow path of the water.


Drain Valve

shown on

right without

tubing (barb

fitting on

indoor models

only)

(indoormodelsonly)


19/40

This water heater is certified for installations up to 3,280feet (1000 m) above sea level. The input rating of thiswater heater is based on sea level operation. At higherelevations, the actual input rate may be lower than thevalue listed on the rating label.

NOTICE: For installations above 3,280 feet (1,000 m)elevation, the Altitude Chip on the PC board must bereplaced. Do not install this water heater at elevationsabove 3,280 feet (1,000 m) without installing theproper Altitude Chip. Please contact your installer,local gas supplier, place of purchase or the CustomerService phone number as listed in this InstructionManual for more information

High Altitude

WARNING: Do not attempt to convert this water heater for use with a different type of gas other than the type shown

on the rating plate. Such conversion could result in hazardous operating conditions.

Gas Supply

The supplied Manual Gas Appliance ShutoffValve must be installed at the gas connection of

the water heater at the time of installation (see

diagram to the left).

The branch gas supply line to the water heater

should be a minimum of 3/4 black steel pipe

or other approved gas piping material.

A ground joint union or ANSI design certified

semi-rigid or flexible gas appliance connector

should be installed in the gas line close to the

water heater. The National Fuel Gas Code

(NFGC) ANSI Z223.1 and CAN B149 code

mandates a manual gas shut-off valve: See

NFGC & B149 for complete instructions.

If flexible connectors are used, the maximum

length shall not exceed 36 (91 cm).

If lever type gas shut offs are used, they shall

be T-Handle type.

Compound used on the threaded joints of the

gas piping must be of the type resistant to the

action of LP gas. Use compound sparingly on

male threads only.

A sediment trap should be installed at the

bottom of the gas line.

Do not use excessive force (over 31.5 ft lbs.[42.7 Nm]) in tightening the pipe, particularly if

teflon pipe compound is used, as the unit may

be damaged.

The inlet gas pressure to the water heater must

not exceed 10.5 w.c. (2.6 kPa) for natural or

14 w.c. (3.5 kPa) for LP gas. For purposes

of input adjustment, the minimum inlet gas

pressure (with main burner on) is shown on the

water heater rating plate. If high or low gas

pressures are present, contact your gas supplier

for correction.

NOTICE: To ensure proper operation of the

heater the gas pipe and gas meter must be

sized correctly.

Gas piping shall be in accordance with l ocal,

utility company requirement and/or in the

absence of local codes, use the latest edition

of the National Fuel Gas Code. In Canada, t he

latest edition of CSA B149.1 Natural Gas and

Propane installation code.

ManualGas

SupplyLine

Shutoff

Manual GasApplianceShutoff

Union

Sediment Trap

Cap

(Valve)

(Supplied)

Leak TestingThe water heater and its gas connections must

be leak tested at normal operating pressuresbefore it is placed in operation.

Turn on the gas shut-off valve(s) to the

water heater.

Use a soapy water solution to test forleaks at all connections and fittings.Bubbles indicate a gas leak that must

be corrected.

The factory connections should also be leak

tested after the water heater is placed in

operation.

Pressure Testing the Gas Supply System

The water heater and its manual gas shut-offvalve must be disconnected from the gas

supply piping system during any pressure

testing of the system at pressures in excess

of 1/2 psi (14 w.c. [3.5 kPa]).

The water heater must be isolated from thegas piping system by closing the manual gas

shut-off valve during any pressure testing of

the gas supply piping at pressures equal to or

less than 1/2 psi (14 w.c. [3.5 kPa]).

WARNING: Never use

an open flame to test for

gas leaks, as property

damage, personal injury,

or death could result.

WARNING: Install a

gas pressure regulator, in

the gas supply line, which

does not exceed the

maximum supply pressure.

DO NOT use an industrial

type gas regulator.


20/40

Remote Control Installation

One (1) remote control is provided with thewater heater. Additional remote controls may

be purchased separately. Up to three (3) remotecontrols can be used with this water heater.

The following are considerations fordetermining the location of the remotecontrol(s):

DO NOT install any remote controloutdoors or in areas where it can come incontact with water.

Place remote control out of childrens reach. The remote control can be installed in

convenient locations such as the kitchen,laundry room, utility room, or directly besidethe indoor water heater.

Avoid areas where the remote control maybe exposed to heat, e.g. stove, ranges orheaters.

Avoid areas where the remote control maybe subjected to oil and/or steamfrom cooking.

Avoid areas where chemical agents (suchas thinner, benzine and alkalines) are used.

Avoid areas of direct sunlight. The MAXIMUM distance between the water

heater and the remote control installationlocation is limited to 195 feet (59 m) of wire.

NOTICE: Only one of each type of remotecontrols can connect to the water heater.Therefore, a maximum of three controlscan connect to the water heater.

No other manufacturers controls aresuitable for use with this water heater.

DO NOT attempt to disassemble theremote control.

WARNING: Field wiring connections and electrical grounding must comply with local codes, or inthe absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70, orin Canada, Canadian Electrical Code, CSA C22.1 Part 1.

Installing the Main Remote Control:

Remote Control

Model Number

Remote Control

Description

Temperature

Set Point RangeAvailability Models

USC1-117 BATH 1100F - 120F

(38C)-(49C)

Optional

(Sold Separately)

Residential and

Commercial

USC2-117 BATH 2100F - 120F

(38C)-(49C)

Optional

(Sold Separately)

Residential and

Commercial

UMC-117 MAIN

100F - 120F

(38C)-(49C)

Provided with

Heater

(Factory Default)

Residential and

Commercial

125F - 140F

(52C)-(60C)

With Dip Switch

AdjustmentResidential

125F - 180F

(52C)-(82C)

With Dip Switch

AdjustmentCommercial

MIC-180

Manifold

System

Manifold

System------

Optional

Sold Separately

Residential and

Commercial

NOTICE: The provided

remote control will allow

a maximum temperature

setting of 120F (49C).

Temperatures of up to 140F

(60C) for Residential

models and up to 180F

(82C) for Commercial

models can be achieved with

the MAIN (UMC-117)

remote control and a dipswitch adjustment. Only

Commercial water heaters

can achieve temperatures up

to 180F (82C). Only

qualified service personnel

should perform this

adjustment.

NOTICE: If the water

heaters are installed in a

manifold system, the mainremote control connected to

the manifold controller

(MIC-180) has priority over

the remote controls

connected to the water

heater.

NOTICE: An optional cable

(DUOnex Cable) can be

purchased separately to

manifold two heaters ofeither Residential or

Commercial together.


21/40

WARNING: Field wiring connections and electrical grounding must comply with local codes, orin the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70,or in Canada, Canadian Electrical Code, CSA C22.1 Part 1.

Remote Control

Connection Terminals

Gas Valve

PCB

18 AWG

Extension

Cable

Clamp

NOTICE: Extension cable

can be any Type-T 18 AWG

wire similar to a thermostat

wire and need not be

polarity sensitive.

Do Not apply sealant to the

remote control cable.

It is not recommended to

have wiring exposed.

Remote Control Installation

Connecting the MAIN (UMC-117 ) remotecontrol to the water heater:

Drill a 1 (2.5 cm) to 1-1/2 (3.8 cm) holeat the proposed control location.

Install the extension cable between thelocation of the remote control and thewater heater.

Remove the base plate from the control. Feed the remote control extension cable

through the central hole in the base plate. Fix the base plate to the wall usingsuitable screws and wall anchors.Ensure the projections on the base

plate are pointing upward.

Connect the remote control cables to theextension cable from the water heater.

Place the remote control over thebase plate. Ensure the projections inthe base plate fit into the housings inthe remote control.

Fix the control to the base plate at thebottom of the remote control using thescrew provided.

Proceed to Connecting the remotecontrol to the water heater, to completeinstallation.

Connecting the remote control to the waterheater:

Ensure that the power to the water heaterhas been disconnected.

Remove the front cover of the water heater. Insert the remote control extension cable

through the hole at the bottom right handcorner of the water heater.

Connect the wires to the terminals on

the top right hand side of the PrintedCircuit Board (PCB) as shown indiagram to the left.

NOTICE: The remote control wireconnection terminals are not polaritysensitive.

Firmly tighten the terminal screws. Secure the remote control extension cable

using the appropriate clamp.

Replace the front cover of the water heater. Switch on the power supply to the water

heater.

Ensure proper operation of the remotecontrol and water heater.

Remote

Control

Projections

Suitable

Wall Anchors

Base Plate

Screws

Control

Screw

Extension

CableWall

Penetration


22/40

Installing the Main Remote Control:

Electrical Connection

POWER CORD

(Indoor water heaters only):

l The electric power supply requirement

for this water heater is 120 VAC/60HZ,

2 Amps.

l The water heater comes with a three (3) pin

power supply cord (INDOOR MODELS

ONLY). Use only a power outlet with a

ground terminal.

l The installation of an electric leakage

breaker is recommended.

l Keep any excess of the power supply cord

on the outside of the water heater.

l If local codes require hardwiring, see

instructions for Hardwiring the Electrical

Connections.

HARDWIRING THE ELECTRICAL

CONNECTIONS

(Indoor or Outdoor water heaters):

l Wiring should be carried out by a qualified

electrician in accordance with local codes.

l The water heater requires 120 VAC/60Hz and

should be properly grounded.

l DO NOT connect grounding wire to water

pipes, gas pipes, telephone cables, lightning

conductor circuits and to grounding circuit

of other equipment that carry a ground-faultinterrupter.

l An ON/OFF switch must be provided and

installed for the incoming 120VAC power.

l Wire the water heater exactly as shown

below. A wiring diagram is also found

inside of the cover panel.

l A green screw is provided in the junction

box for a grounding connection.

l Connect the live wire to black leg wire and

the neutral wire to the white neutral wire.

WARNING: Shock

hazard line voltage is

present. Before servicing

the water heater, turn off

the electrical power to the

water heater at the main

disconnect or circuit

breaker. Failure to do so

could result in severe

personal injury or death.

CAUTION: Labelall wires prior to

disconnection when

servicing controls. Wiring

errors can cause improper

and dangerous operation.

Verify correct operation

after servicing.

On/Off

Switch

Junction

Box

Ground Screw

Wire

Connections

WARNING: Field wiring connections and electrical grounding must comply with local codes, orin the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70,or in Canada, Canadian Electrical Code, CSA C22.1 Part 1.


23/40


Typical Installation of Water Heater(Venting Required for Indoor Models Only)

To Hot Water

Faucet(s)

ReliefValveUnion

Drain Valve

6" (15 cm) Air Gap

Manual Gas

Appliance

Shut-off(supplied)

Sediment

Trap

Manual

Gas Supply Line

Shut-off

Valve

Union

Cap

Cold Water

Supply

Shut-off

Valve

Check

Valve

1/4" Per Foot Downward Pit

90 Elbow

Vent Adapter

PowerSupplyCord

Water Filter

Drain Valve

Drain

Hose(To Suitable Drain)

Discharge

Line(To Suitable Drain)

Air Intake

Filter

NOTICE: The National Fuel Gas Code (NFGC) and B149 mandates a manual gas shut-off valve: See

NFGC/B149 for complete instructions. Local codes or plumbing authority requirements may vary from

th i t ti di id d d t k d t th i t ti

Vacuum Relief Valve

(Not Supplied)

If required, install per local codes

and valve manufacturers

instructions.Water InletWater

OutletDrain

Pressure Relief

Valve

Hot Water Service

ValveCold Water

Service Valve

Alternate Water Piping Arrangement

with Optional Valve Kit

Discharge

Line(To Suitable Drain)

To Hot Water

Faucet(s)

Relief

Val veUnion

Drain Valve

6" (15 cm) Air Gap

Manual Gas

Appliance

Shut-off(supplied)

Sediment

Trap

Manual

Gas Supply Line

Shut-off

Val ve

Union

Cap

Cold Water

Supply

Shut-off

Val ve

Check

Val ve

Water Filter

Drain Valve

On/Off

Switch

Conduit for

Wiring to Unit

Flue Terminal

F

PRIORITY

POWERON/OFF

Remote

Control

Indoor Models Outdoor Models

Install indoors only.


24/40


For increased energy efficiency, use pipe

insulation. Please install the insulation

according to the diagram above, making sure

to insulate all the way to the top. Do not

cover any drain or pressure relief valve(s).

Dos

q Do follow all installation instructionscovered in this manual.

q Do check inlet gas pressure to ensurethat it is within the range specified onthe rating plate.

q Doprovide adequate air for combustionand ventilation as discussed in theInstruction Manual and the National FuelGas Code (CAN/CGA B149 in Canada).

q Do maintain proper clearances tocombustibles and non-combustibles asspecified on the nameplate.

q Do ensure that the venting system complieswith the guidelines found in the InstructionManual and National Fuel Gas Code(CAN/CGA B149 in Canada).

qDo contact local gas company to ensure gasmeter and gas piping are adequately sized.

q Do use teflon tape on water lineconnections and fittings.

Donts

q Dontblock or restrict Air IntakeOpening located on the front coverof the water heater.

q Dont remove the front cover unlessabsolutely necessary. This should only bedone after being examined by a qualifiedservice technician.

q Dont install this product where standing

water may occur.q Dont use pipe dope on water line

connections and fittings.

During Installation of this water heater

Hot and Cold Pipe Insulation Installation

Insulation Blankets

Insulation blankets, available to the generalpublic for external use on gas water heaters,are not necessary. The purpose of an

insulation blanket is to reduce the standbyheat loss encountered with storage tankheaters. This water heater does not store watermaking an insulation blanket unnecessary.

The manufacturers warranty does not coverany damage or defect caused by installation,attachment or use of any type of energysaving or other unapproved devices (otherthan those authorized by the manufacturer)into, onto or in conjunction with the waterheater. The use of unauthorized energy savingdevices may shorten the life of the waterheater and may endanger life and property.

The manufacturer disclaims any responsibilityfor such loss or injury resulting from the useof such unauthorized devices.

CAUTION: If local codes require theapplication of an external insulationblanket to this water heater, pay carefulattention to the following so as not torestrict the proper function and operationof the water heater:

l Do not cover the air inlet, flue outlet or

operating and warning labels attached to

the water heater or attempt to relocate them

on the exterior of insulation blanket.

WARNING: If localcodes require externalapplication of insulation

blanket kits themanufacturersinstructions includedwith the kit must becarefully followed.

NOTICE: The hot and coldpipes should be insulated asshown to provide additionalfreeze protection.

Water Inlet

Pressure Relief

Valve

Drain Valve

Hot Water Service

Valve

Cold Water

Service ValveWARNING: In case the

pipe insulation is not ratedfor the appropriateweather conditions installelectric heat tracing or

equivalent to preventfreezing of the pipes. Donot insulate or block drainvalve on the hot outletfitting. If the pipes areallowed to freeze, the waterheater and the pipes maymalfunction or leak due tofreezing water.

Pipe Insulation


25/40

A. OutdoorWater Heater Location

q Outdoor water heaters must be installed outdoors.

q Protected from freezing temperatures.

B. Indoor Water Heater Location

q Close to area of vent termination.

q Indoors and protected from freezing temperatures.

C. Outdoor and Indoor Water Heater Location

q Proper clearance from combustible surfaces observed.

q Sufficient fresh air supply for proper operation ofwater heater.

q Air supply free of corrosive elements andflammable vapors.

qProvisions made to protect area from water damage.

q Sufficient room to service heater.

q Combustible materials, such as clothing, cleaningmaterials, rags, etc. clear of the heater andvent piping.

q Water heater is properly attached to the wall.

D. Water Supply

q Water supply has sufficient pressure.

q Air purged from water heater and piping.

q Water connections tight and free of leaks.

q Water filter is clean and in place.

q Materials used are as instructed in this manual.

q Water pipes are insulated and protected fromfreezing.

E. Gas Supply

q Gas type matches rating plate.

q Gas supply pressure is sufficient for the water heater.

q Gas line equipped with shut-o

Documents

Paloma Manual